Light ray enters from air to glass plate.what is the speed of light in glass if it refractive index is 1.5 ?
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Refractive index = 1.5
According to laws of refraction
Refractive index = Speed of light in vacuum or air/Speed of light in the medium(glass)
1.5=3*10^8 / speed in glass
Speed of light in glass =5 *10^7
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